Proof Research PR15 PXT Carbon Fiber Barrel – 6mm ARC 16″

Elevate your AR-15 platform with the Proof Research PR15 PXT Carbon Fiber Barrel in 6mm ARC with a 16-inch profile. Engineered for precision and built to last, this barrel combines Proof Research’s renowned carbon fiber wrapped steel technology with their Performance Xtreme Tough (PXT) design — delivering exceptional accuracy, reduced weight, and superior heat dissipation compared to traditional steel barrels.

The 6mm ARC (Advanced Rifle Cartridge) chambering makes this barrel an outstanding choice for hunters, long-range shooters, and competitive marksmen who demand consistent performance at extended distances. Whether you’re running drills on the range or heading into the field, the reduced barrel weight helps you stay on target longer without fatigue, while the carbon fiber construction keeps temperatures manageable through sustained strings of fire.

Proof Research barrels are manufactured in the USA to exacting tolerances, making them a top-tier choice for custom builds and serious upgrades alike. At Deep Roots Rifle Co, we stock hard-to-find precision components like this one so you don’t have to wait. Order online for fast shipping nationwide, or stop by our gun shop in Eustis, Florida to speak with our knowledgeable staff about whether this barrel is the right fit for your build.